| 摘要 |
A compound represented by one of formulae (I)-(V) or a pharmaceutically acceptable salt thereof is used as an active ingredient for an interleukin-2 production inhibitor. In formula (I), R1, R2 and R3 each represents a hydrogen atom or the same group selected from among alkyl groups having 1-5 carbon atoms, and X represents a halogen atom. In formula (II), R4 represents a hydrogen atom or an alkyl group having 1-5 carbon atoms, and X represents a halogen atom. |
